An open-source 4X civilization-building game
Discover [yyxx], a free and open-source reimplementation of one of the most iconic civilization-building games ever created. Designed to be fast, lightweight, and completely ad-free, [yyxx] offers endless strategy without compromise—no in-app purchases, no distractions, just pure gameplay.
Forge your empire from the dawn of history! Build mighty cities, research groundbreaking technologies, manage resources, and engage in diplomacy or warfare as you lead your civilization to glory. Whether you're expanding peacefully or conquering with force, every decision shapes your path to victory.
[yyxx] is built for both casual players and strategy enthusiasts alike, offering intuitive controls and deep gameplay mechanics inspired by classic turn-based 4X titles.
Want to contribute? We welcome your help!
- Have an idea or found a bug? Check out our todo list and issue tracker on GitHub: https://github.com/yairm210/Unciv/issues
- Got questions or need support? Join our friendly community on Discord: https://discord.gg/bjrB4Xw
- Help translate [yyxx] into your language and make the game accessible to more players worldwide: https://yairm210.github.io/Unciv/Other/Translating/
The world is waiting—will your civilization rise to become legendary?
Note: Internet access is required for multiplayer functionality.
